Molder&#39;s flask



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adieu M. WAGNER MOLDER'S FLASH Filed March 25, 1920 Patented Mar. 18, 1924.

MICHAEL M. WAGNER, OF BALTIMORE, MARYLAND.

' .i MOLDERS FLASK.

Application filed March 25, 1920. Serial No. 368,647.

To all whom it may concern:

Be it known that I, Micnsnr. M. WAGNER, a citizen of the United States, residing at Baltimore, county of Baltimore, State of Maryland, have invented a certain new and useful Improvement in Molders Flasks, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and maths same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to molders" flasks, and has for its object an improved arrangement of parts by means of which, after the cope and drag portions of the flask have been assembled and fllled with sand, a number of them may either be piled one on top of another, or arranged in a column for subjection to pressure from the now well known squeezing machine, without the necessity of the operators ramming the sand rontents so hard as to involve crushing, as was the case when flasks of this form, as heretofore used, were piled or otherwise subjected to pressure.

In the drawings:

Figure l is a perspective of my improved flask with a portion of the wall broken away to show the interior thereof.

Figure 2 is a lengthwise sectional elevation of three flasks embodying my improved construction, assembled in stacked position for pouring.

F1 gure 3 is a plan view, on a rather small scale,'of a preferred form of metal spacing plate for the piled flasks.

A represents the cope portion and B the drag portion of a molders flask, each provided with the terminal handles C, and registering ears or lugs D and E respectively. The meeting edges of these two parts, as F and G, maybe slightly flanged.

At each end of the drag member B, slightly above its bottom edge, is located a. supporting strip or ledge K, or a pair of aligned studs or pins, upon which the ends of the bottom board J are adapted to rest. Fixed to the outer surface of the bottom board, and of such thickness as to extend to or slightly below the level of the bottom edge of the drag, are cross pieces L. The flask as a whole is filled to the requisite degree with sand, with the cross pieces L of the bottom board resting upon the floor or upon the pouring ofi bench. Any surplus sand is then swept off or moved to a portion of the flask which is not so full, by the use of any convenient scraping medium such as the edge of aboard, so that when the sweep of the board across the upturned top edge has been completed, the top level of the sand is uniform with the then top edge of the flask. The mass of sand within the flask cannot sink because it rests upon the cover J, whose position relatively in the flask is unchanged because of the engagement against its opposite faces of the ledges K on the flask wall and the cross pieces L. A metal plate H is now placed across the upturned top of the flask,and when another flask has been'filled, as already described, the cross pieces L of its board J rest upon.

the exposed top surface of the plate H,

which, as shown in Figure 3, is preferably formed with a curved indentation I along one side, to afford ample access tothe uncovered end portion of the flask wherein the sprue is located, which end portion of each, except the top one, of a pile of flasks is left exposed by the positioning of the flasks above it in the stepped or partially overengaging position brought out in Figure 2. \Vhether a stack be formed by the addition of other filled flasks, or whether a single flask be subjected to the action of the squeezing machine, the sand therein is held against movement relatively thereof by its plate H and board J, but no amount of strain can cause the trans-mission of compressive pressure from one mass of sand to another in a adjacent flask, whether the quantity in each be evenlyrammed or not. This not only saves as to the length oftime nesessary to devote to each flask, but enables a much more inexpensive and unskilled class of helpers to be satisfactorily employed than has heretofore been the case, when ramming of the sand to the desired degree has formed such an important part of the manufacturing process.

What I claim is:

1. In a molders flask, in combination with complementary cope and drag membershaving rectangularly disposed interior surfaces, cleats fixed about the inner edges of the drag member slightly above the lower edges thereof, a bottom board whose. possible movement toward the upper portion of the flask is limited by the engagement of said cleats against its edge ortions, said bottom board and its attache parts being of such total thickness that its displacement relatively to the drag member cannot occur until the intentional emptying of the flask is begun.

2. In a moldefs flask, the combination, with a cope member, of a drag member complementary thereto, the interior surfaces of each being plane and parallel to those oppositely disposed, a. removable bottom board for closing the bottom oi the drag member, means carried by the bottom board for resisting its displacement relatively to the drag ineinhei, and inwardly projecting ledge pieces located aclistance above the bottom edge of the drag ineinher slightly. in XCQSS of the thickness of the bottom hoard whereby its undue movement Within the drag ineinbeiiis prevented.

3. In combination with a plni'ality of on each for permitting their 1. 11g upon another While avoiding esultant undue pressure upon the contents any one, consisting of e hottoin hozii'd adap ed to fit inside the lower portion of each, and an interiorly projecting ledge lo cated above the lower edge of the drag POE- tion of the distance slightly in excess of the thickness 01 the bottom hoard, and against Whose suriece the edg s of the 

